U
    P^e                     @   sV   d dl Z d dlmZ d dlmZ d dlmZ d dlmZ e 	e
ZG dd deZdS )    N)BuildEnvironment)AbstractDistribution)InstallationError)runner_with_spinner_messagec                   @   s(   e Zd ZdZdd Zdd Zdd ZdS )	SourceDistributiona  Represents a source distribution.

    The preparation step for these needs metadata for the packages to be
    generated, either using PEP 517 or using the legacy `setup.py egg_info`.

    NOTE from @pradyunsg (14 June 2019)
    I expect SourceDistribution class will need to be split into
    `legacy_source` (setup.py based) and `source` (PEP 517 based) when we start
    bringing logic for preparation out of InstallRequirement into this class.
    c                 C   s
   | j  S N)reqget_dist)self r   J/tmp/pip-install-220asx0h/pip/pip/_internal/distributions/source/legacy.pyget_pkg_resources_distribution   s    z1SourceDistribution.get_pkg_resources_distributionc                 C   s<   | j   | j jo|}|r$| | | j   | j   d S r   )r   load_pyproject_toml
use_pep517_setup_isolationprepare_metadataassert_source_matches_version)r
   finderbuild_isolationshould_isolater   r   r   prepare_distribution_metadata   s    


z0SourceDistribution.prepare_distribution_metadatac              
      s    fdd}t  j_jj|jjdd jjjj\ } rT|d  |rtdj tdd	t
tt| jj4 td	}jj}|| | }W 5 Q R X W 5 Q R X jj|\ } r|d
  jj||dd d S )Nc                    s6   d}|j j| ddd t D d}t|d S )NzZSome build dependencies for {requirement} conflict with {conflicting_with}: {description}.z, c                 s   s   | ]\}}d ||f V  qdS )z%s is incompatible with %sNr   ).0	installedwantedr   r   r   	<genexpr>3   s   zPSourceDistribution._setup_isolation.<locals>._raise_conflicts.<locals>.<genexpr>)requirementconflicting_withdescription)formatr   joinsortedr   )r   conflicting_reqsformat_stringerror_messageconflictingr
   r   r   _raise_conflicts+   s    
z=SourceDistribution._setup_isolation.<locals>._raise_conflictsoverlayzInstalling build dependenciesz"PEP 517/518 supported requirementsz4Missing build requirements in pyproject.toml for %s.z`The project does not specify a build backend, and pip cannot fall back to setuptools without %s.z and z#Getting requirements to build wheelzthe backend dependenciesnormalzInstalling backend dependencies)r   r   	build_envinstall_requirementspyproject_requirescheck_requirementsrequirements_to_checkloggerwarningr   mapreprr    r   pep517_backendsubprocess_runnerget_requires_for_build_wheel)r
   r   r&   missingrunnerbackendreqsr   r$   r   r   *   sP    
  

  z#SourceDistribution._setup_isolationN)__name__
__module____qualname____doc__r   r   r   r   r   r   r   r      s   r   )loggingpip._internal.build_envr   Z pip._internal.distributions.baser   pip._internal.exceptionsr   Zpip._internal.utils.subprocessr   	getLoggerr9   r.   r   r   r   r   r   <module>   s   
